injected settings stay same after removing plugin

Hi, this plugin injects the settings into the system.
after i wanted to exclude some links to not being nofollow, it didn’t work. Then i tried to deactivate the plugin, and its still the same with all tags including the data-wpel-link tag in every links. in database the settings are not shown and the tags are normal. Cache is cleared.
Even after removing the entire plugin, the settings are still there. Chache is cleared multiple times.

How to solve this? Where did this plugin inject the settings into? And why is that allowed in

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